Published August 2016 | Version v1
Journal article

Search for the lepton flavour violating decay μ+ → e+γ with the full dataset of the MEG experiment

  • 1. INFN Sezione di Pisa, Pisa (Italy)
  • 2. Pisa Univ. (Italy)
  • 3. Paul Scherrer Institut PSI, Villigen (Switzerland)
  • 4. ICEPP, The University of Tokyo, Tokyo (Japan)
  • 5. Pisa Univ. (Italy). Dipt. di Fisica
  • 6. Swiss Federal Institute of Technology ETH, Zurich (Switzerland)
  • 7. Genoa Univ., Dipartimento di Fisica (Italy)
  • 8. INFN Sezione di Genova, Genoa (Italy)
  • 9. Pavia Univ., Dipartimento di Fisica (Italy)
  • 10. INFN Sezione di Pavia, Pavia (Italy)
  • 11. University College London, Department of Physics and Astronomy, London (United Kingdom)
  • 12. Universita del Salento, Dipartimento di Matematica e Fisica, Lecce (Italy)
  • 13. INFN Sezione di Lecce, Lecce (Italy)
  • 14. Pavia Univ. (Italy)
  • 15. INFN Sezione di Roma, Rome (Italy)
  • 16. Rome Univ. ''Sapienza'' (Italy)
  • 17. Genoa Univ. (Italy)
  • 18. Waseda University, Research Institute for Science and Engineering, Tokyo (Japan)
  • 19. Universita del Salento (Italy)
  • 20. Rome Univ. ''Sapienza'', Dipartimento di Fisica (Italy)
  • 21. Novosibirsk State University, Novosibirsk (Russian Federation)
  • 22. Novosibirsk State Technical University, Novosibirsk (Russian Federation)
  • 23. Budker Institute of Nuclear Physics, Russian Academy of Sciences, Novosibirsk (Russian Federation)
  • 24. KEK, High Energy Accelerator Research Organization, Tsukuba, Ibaraki (JP)
  • 25. Novosibirsk State University, Novosibirsk (RU)
  • 26. Budker Institute of Nuclear Physics, Russian Academy of Sciences, Novosibirsk (RU)
  • 27. University of California, Irvine, CA (US)
  • 28. Joint Institute for Nuclear Research, Dubna (RU)
  • 29. Rome Univ. ''Sapienza'', Dipartimento di Fisica, Rome (IT)
  • 30. INFN Sezione di Roma, Rome (IT)
  • 31. Paul Scherrer Institut PSI, Villigen (CH)
  • 32. Pisa Univ., Scuola Normale Superiore (IT)
  • 33. INFN Sezione di Pisa, Pisa (IT)

Description

The final results of the search for the lepton flavour violating decay μ+ → e+γ based on the full dataset collected by the MEG experiment at the Paul Scherrer Institut in the period 2009-2013 and totalling 7.5 x 1014 stopped muons on target are presented. No significant excess of events is observed in the dataset with respect to the expected background and a new upper limit on the branching ratio of this decay of B(μ+ → e+γ) < 4.2 x 10-13 (90 % confidence level) is established, which represents the most stringent limit on the existence of this decay to date. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epjc/s10052-016-4271-x

Additional details

Publishing Information

Journal Title
European Physical Journal. C, Particles and Fields (Online)
Journal Volume
76
Journal Issue
8
Journal Page Range
p. 1-30
ISSN
1434-6052

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
47106985
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
BRANCHING RATIO; EXPERIMENTAL DATA; MUON NUMBER; MUONS PLUS; RADIATIVE DECAY; SYMMETRY BREAKING
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; DATA; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FERMIONS; INFORMATION; LEPTON NUMBER; LEPTONS; MATTER; MUONS; NUMERICAL DATA; PARTICLE DECAY

Optional Information

Collaborations
MEG Collaboration